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Recent EventLogging change breaking Echo, Popups on blocked event.gif calls / on Firefox with Adblock Plus
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Description

A recent change is breaking the Echo-Notfication-List and the hovercard extension, probably other scripts too.
It is caused by blocked calls to https://bits.wikimedia.org/event.gif? (blocked e.g. by Firefox with Adblock Plus).

[...]
On leaving the hovercard a request is created (and appears as blocked in Adblock Plus), simultaneously Web Console gets a red x entry with message ":" only and location (via debug=true) at ext.eventLogging.core.js:222 (1.25wmf14) in the EventLogging-Extension.

I suspect this is caused by https://gerrit.wikimedia.org/r/182890 (which was also backported to wmf13 and 14)

Reports:

Event Timeline

Se4598 created this task.Jan 15 2015, 2:10 PM
Se4598 raised the priority of this task from to Unbreak Now!.
Se4598 updated the task description. (Show Details)
Se4598 added a project: Analytics-EventLogging.
Se4598 added a subscriber: Se4598.
Restricted Application added a subscriber: Aklapper. · View Herald TranscriptJan 15 2015, 2:10 PM

Yesterday for me this also broke the rendering of CPB on top of https://www.mediawiki.org/wiki/Special:Notifications?debug=true for me (icons way lower than text); JS console showed a wonderful line with just one colon, pointing to https://bits.wikimedia.org/static-1.25wmf14/extensions/EventLogging/modules/ext.eventLogging.core.js :222 - today that looks okay again, don't know.

Popularity of Adblocker tools in browsers might trigger a variety of "interesting" issues brought up on Village Pumps etc, hence this should be pretty high priority.

Aklapper added a subscriber: greg.Jan 15 2015, 2:23 PM

This seems to be the same as T86680, hence merging.